<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <style>
      .box {
        width: 300px;
        height: 300px;
        background-color: red;
      }
    </style>
  </head>
  <body>
    <input type="text" id="ipt" />
    <script>
      const oIpt = document.getElementById("ipt");

      function center(e) {
        console.log("发送数据");
        console.log(e);
        console.log(this);
      }

      oIpt.onkeyup = debounce(center, 500);

      function debounce(fn, time) {
        let timer = null;
        return function (e) {
          clearTimeout(timer);
          timer = setTimeout(() => {
            fn.call(this, e);
          }, time);
        };
      }
    </script>
  </body>
</html>
